Replacement for ada4851-4

Hello Sai,

For a RRIO replacement for the ADA4851-4, I would recommend the AD8040 The AD8040 is 125MHz RRIO low power quad op amp, that should meet your needs nicely.

Regards

John Ardizzoni

High Speed Amplifiers

Product Manager

thanks john,

ad8040 met most of my requirements. the only problem was that the settling time of 80ns was too high.

I have searched the amplfiers but couldnt find any.

If u have any other amp in mind plz mention it thanx.....

sai

A bit more information would help, such as supply voltage, closed loop gain, signal amplitude and bandwidth. From your comments I'm guessing that you want a device with an input common mode range that extends to within 1V of the positive supply. Without this information I can only suggest you look at the following list:

AD8021

AD8038/9

AD8057/8

HFA1100

LMH6639

LT1818/9

My parametric opamp chooser at http://www.sevensoftltd.com/OpAmp.aspx lets you filter on bandwidth, slew rate and common range.

Hello,

Thanks for the suggestions Oliver, but I can only recommend the Analog Devices op amps

The customer however was originally interested in quads, if they can go to duals then there perhaps there be more/better options.

As for the AD8040 not meeting the settling time that is our only true RRIO quad that we offer. Would you consider using two duals?

Regards

Jack

Thank u guyz for ur intrest in my problem

I basically require RRIO in quad package...

Dual might be fine

I have found AD8028 which meets most of my requirements.

plz suggest any better IC with lower power consumption and wider BW as acc to the datasheet my operations are falling into the overshoot regions

Input signal swing-0 to 3V

planned supply voltage-3.3V and 0V

configured in unity gain mode

thanks once again

Hi,

The AD8028 is our widest BW true RRIO dual op amp we have today. If you could provide a little more supply voltage the ADA4891-4 might be of interest to you.

Regards

Jack